Great idea for a thread.

Stuff we bought that we found we hardly used were,

Nappy bag was only good for infants so don't spend mega $$$$$, Once the children were toddlers the nappy bag became redundant. We used a small backpack instead and it was so much better.

baby bath, Most of the time baby had a bath with me and was scooped up by dh and dressed.

big expensive pram. I did love my big pram but also became redundant once child was one. They both prefered to walk or go in the layback stroller. If I had my time again I'd only buy the layback stroller. SOme of those can cost big $$$$$ But they are only suitable for newborns if they layback almost flat.